<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt_rt" %>

<html>

<head>
    <title>登录页</title>
    <%--echart线图、柱状图、饼图等各种图型库 cdn--%>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/echarts/5.4.3/echarts.min.js"></script>
    <%--jquery cdn--%>
    <script type="text/javascript" src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.1/jquery.js"></script>
</head>
<body>
产品ID <input name="productNum">

<button onclick="zxt()">折线图</button>
<button onclick="excel()">excel</button>


<div id="main" style="width: 1000px;height: 500px"></div>
</body>


<script>

    function excel() {
        let productNum = $('[name=productNum]').val();
        location.href = '/excel.do?productNum=' + productNum
    }
    function zxt() {

        let productNum = $('[name=productNum]').val();

        $.ajax({

            url: '/zxt.do?productNum=' + productNum,
            success: function (data) {
                console.log(data)

                var x = []
                var y = []

                for (let i = 0; i < data.length; i++) {
                    x.push(data[i].xdata)
                    y.push(data[i].ydata)
                }

                var chartDom = document.getElementById('main');
                var myChart = echarts.init(chartDom);
                var option;

                option = {
                    xAxis: {
                        type: 'category',
                        data: x
                    },
                    yAxis: {
                        type: 'value'
                    },
                    series: [
                        {
                            data: y,
                            type: 'line'
                        }
                    ]
                };

                option && myChart.setOption(option);

            }
        })

    }
</script>
</html>